Pulleys are simple machines that have many uses, from lifting an injured boater into a rescue helicopter to drawing a bucket of water from a well! This book explains the science behind this helpful machine. Experiments, presented step-by-step and with photos, encourage students to engage with the pulleys in their own lives.

Do your readers wait until the last minute to start their science project? Don't worry, award-winning author Robert Gardner has everyone covered. Each experiment in this book follows the scientific method, and can be completed in an hour or less. Readers explore using levers to control motion and lift, and how the steepness of inclined planes affects the force needed to move something. Most experiments also include ideas for science fair projects, in case readers have more time than they originally thought.

"Simple Machines! introduces kids to the concept of mechanical advantage and harnesses kid-power by inviting them to build machines of their own design. This book also opens eyes and minds to the diversity of machines in their lives, and sparks the imagination with challenge, humor, and achievable projects"--Publisher.

Examines levers, explains their functions, and suggests simple experiments to demonstrate how they work

Defines pulleys, explains their functions, and suggests simple experiments to demonstrate how they work.

Provides instructions on how to do simple science experiments using simple machines, and gives explanations for why they work.

Contains simple and fun experiments that you can try using common household objects.